Eagle_SX4 Posted May 24, 2023 Share Posted May 24, 2023 I am working on putting the fuel injection back on my '92 4.0 I have in my AMC Eagle SX4. The last 4 years I have been running it with the 4.2 liter manifold and carb set up. It is now finally time to put the original fuel injection back on it. I am having problems locating a good wiring schematic. I have the Haynes manual which has the computer wire schematic but I doesn't have the firewall bulkhead connector diagram or the power distribution center diagrams. I was wondering if anyone had either of those diagrams? Link to comment Share on other sites More sharing options...
acfortier Posted May 24, 2023 Share Posted May 24, 2023 Here's the bulkhead diagrams from my 91 FSM Link to comment Share on other sites More sharing options...
acfortier Posted May 24, 2023 Share Posted May 24, 2023 Here's the PDU Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted May 24, 2023 Author Share Posted May 24, 2023 Awesome thanks @acfortier. That is what I was looking for. This will make things a lot easier when I start slimming down the harness. Link to comment Share on other sites More sharing options...
acfortier Posted May 24, 2023 Share Posted May 24, 2023 Just now, Eagle_SX4 said: Awesome thanks @acfortier. That is what I was looking for. This will make things a lot easier when I start slimming down the harness. NP. If it's hard to read, shoot me a message and I can get you a higher res. image. Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted May 27, 2023 Author Share Posted May 27, 2023 So it turns out jeep changed some things between 91 and 92 on the power distribution center. Here is a picture of the layout for both. It might be hard to read but they moved the relays around and added a fuse to the fuel injection. Still trying to sort it all out. If anyone has a 92 power distribution center schematic it would help a bunch. Link to comment Share on other sites More sharing options...
1987Comanche Posted May 28, 2023 Share Posted May 28, 2023 Here's what I found in my '92 FSM: Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted May 28, 2023 Author Share Posted May 28, 2023 Thanks @1987Comanche that layout for the power distribution center is what I was looking for. Is there a more detailed diagram showing wire color? Link to comment Share on other sites More sharing options...
1987Comanche Posted May 28, 2023 Share Posted May 28, 2023 Here's what I found: Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted June 10, 2023 Author Share Posted June 10, 2023 Thanks for all the diagrams it helped me to get all the wiring finished today. I got the engine to fire up but it won't stay running. I think it is a bad IAC valve. It runs for about 5 seconds with it unplugged and only about 1 second with it plugged in. The IAC and throttle body are clean I disassembled the entire throttle body and soaked all non electrical parts is my parts cleaner. Any tips on how to test the IAC Valve? I also think the TPS isn't working properly. I tested the TPS at closed throttle it is about .78 volts and at full throttle is only 3.5 volts. I have read that it is supposed to be 1 volt at closed and 4.5 at wide open. It's too bad you can't adjust it like a Renix TPS. I took it off and turned it with a screw driver and was able to get the 4.5 volts it is supposed to have but it won't do it at full throttle. Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted June 10, 2023 Author Share Posted June 10, 2023 Just kidding it was the computer I swapped in the spare I had and it now runs!!! Link to comment Share on other sites More sharing options...
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